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以 2 5～ 50ｍｍ公法线千分尺为例对其检定方法的总不确定度分析如下 :1 Ａ类分量在 30 12ｍｍ处重复测量 6次 ,数值略 ,得出ｘ =2 3μｍ由贝塞尔公式 :Ｓ =∑ｎｉ=1(ｘｉ-ｘ) 2ｎ - 1=0 52 μｍ自由度ν =ｎ - 1=52 Ｂ类分量2 1 用五等量块在 30 12ｍｍ处检定示?
The total uncertainty of the verification method for a 25-50mm common-law micrometer is as follows: 1. The A-type component is repeatedly measured 6 times at 30 12mm and the value is slightly. The result is x = 2 3μm. The Bessel formula: S = Σni = 1 (xi-x) 2n - 1 = 0 52 μm Degrees of freedom v = n - 1 = 52 Class B component 2 1 Check with a five equal block at 30 12 mm?